It's a different world. Even in county lock ups. If you can't make a friend or two, you can be alienated, bullied, any number of things. It's a world he's never known. He's a new fish in the tank, others who have been in there for awhile, or are on the frequent flyer program, can be intimidating. They know the ropes. It's a scary place in there, and, if convicted, he'll be going to a much scarier one (pen). He'll either adapt, and learn to survive, or he won't. Someone seeking to up their status may make a target out of him, or the other two males, b/c of the murdered females and CR2. For those who can't adapt, well, welcome, from the 6th, to the 9th, Layer of Hell. Imo, that would be a fate worse than death.
